Vacuum cleaner



FIG. 1 is a top and right side perspective view of the vacuum cleaner,showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear and left side perspective view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The ornamental design for a vacuum cleaner, as shown and described.